-\func{void}{DrawHeaderButton}{\param{wxWindow* }{win}, \param{wxDC\& }{dc}, \param{const wxRect\& }{rect}, \param{int }{flags = 0}, \param{wxHeaderButtonParams* }{params = NULL}}
+\func{int}{DrawHeaderButton}{\param{wxWindow* }{win}, \param{wxDC\& }{dc}, \param{const wxRect\& }{rect}, \param{int }{flags = 0}, \param{wxHeaderSortIconType }{sortArrow = wxHDR\_SORT\_ICON\_NONE}, \param{wxHeaderButtonParams* }{params = NULL}}
+
+Draw the header control button (used, for example, by
+\helpref{wxListCtrl}{wxlistctrl}). Depending on platforms the
+\arg{flags} parameter may support the \texttt{wxCONTROL\_SELECTED}
+\texttt{wxCONTROL\_DISABLED} and \texttt{wxCONTROL\_CURRENT} bits.
+The \arg{sortArrow} parameter can be one of
+\texttt{wxHDR\_SORT\_ICON\_NONE}, \texttt{wxHDR\_SORT\_ICON\_UP}, or
+\texttt{wxHDR\_SORT\_ICON\_DOWN}. Additional values controlling the
+drawing of a text or bitmap label can be passed in \arg{params}. The
+value returned is the optimal width to contain the the unabreviated
+label text or bitmap, the sort arrow if present, and internal margins.
+